What Is Electrical Energy?

Electric energy refers to the ability to use electricity to perform work (ie, generate energy) in various forms. Electric energy is not only an economical, practical, clean and easy to control and convert energy form, but also a special product provided by the power sector to power users to ensure the quality of the three parties. If it can be measured, estimated, guaranteed or improved.

The use of electrical energy is

With DC power,

The electrical energy used in daily life mainly comes from the conversion of other forms of energy, including

The unit of electrical energy is "degrees", and its scientific name is

The electrical energy used in daily life mainly comes from the conversion of other forms of energy, including

Power quality is the quality of power in the power system. Its definition is: The concept of qualified power quality means that the power provided to sensitive equipment and the grounding system are suitable. The ideal electrical energy for the normal operation of the device should be a perfectly symmetrical sine wave. Some factors can cause the waveform to deviate from the symmetric sine, which creates power quality issues. On the one hand, we study what influencing factors can cause power quality problems.

Power transmission

We study what problems these factors lead to. Finally, we want to study how to eliminate these factors to maximize the energy close to a sine wave.

The meaning of 'power' (electricity, electric power, etc.) in electrical engineering refers to the rate of energy transmission, which is proportional to the product of voltage and current, so it is impossible to define the concept of mass of this physical quantity. In fact, the power supply system can only control the voltage level and cannot control the amount of current drawn by a load. Therefore, the quality of the voltage is discussed in most cases. Of course, in actual operation of the system, there is always an inseparable close relationship between voltage and current. Although the generator provides an almost pure sinusoidal voltage, the current through the system impedance may cause a voltage on the common connection point (PCC). Changes such as:

(1) The short-circuit current may cause the voltage to drop or disappear completely;

(2) Lightning current injection into the system causes a surge voltage, causing frequent insulation flashovers, and may also cause other phenomena such as short-circuit faults;

(3) When the distortion current injected by the load of the harmonic source flows through the impedance of the system, the bus voltage is also distorted, and other power users on the bus will bear the non-sine wave voltage.

Through the above analysis and discussion, we believe that the study of power quality issues is driven by the production needs of power users, and the user's measurement standards should take precedence ^[4] .